FINAL SURVEY REPORT - mrt.tas.gov.au · SEBOA Group Shoot, Australia Final Survey Report Survey: Santos, T48P Area: South East Basin, Offshore Australia Pacific Titan - Job 6374 Page

FINAL SURVEY REPORT

CGGVeritas

VESSEL: M/V PACIFIC TITAN - Marine 2D & High Resolution SEISMIC REFLECTION METHOD ACQUISITION -

Location : AUSTRALIA Area : West of Tasmania - Australia Survey : T/48P KING ISLAND 2D - SOSN08C MARINE SEISMIC SURVEY Client : SANTOS OFFSHORE Pty Ltd Duration : 04th March 2008 - 12th March 2008 C.G.G.V. SURVEY N° : 501 11 89 07 06 00 (Job N°: 6374) CONTRACT N° : 859832

SEBOA Group Shoot, Australia Final Survey Report Survey: Santos, T48P Area: South East Basin, Offshore Australia

Pacific Titan - Job 6374 Page 2

Table of Contents

1. SURVEY INFORMATION AND OBJECTIVES.................................................................... 5

2. SURVEY AREA (T/48P KING ISLAND 2D - SOSN08C) .................................................... 6 2.1. PREPLOT MAP..................................................................................................................... 6 2.2. POSTPLOT MAP................................................................................................................... 7

3. CONTRACT WORK ORDER ............................................................................................... 8

4. VESSEL DESCRIPTION...................................................................................................... 9 4.1. VESSEL SPECIFICATIONS – PACIFIC TITAN ............................................................................ 9 4.2. SEISMIC PARTICULARS ...................................................................................................... 11

4.2.1. Streamer and Sensors Details................................................................................. 11 4.2.2. Recording System Details ....................................................................................... 11 4.2.3. Seismic QC Details .................................................................................................. 12 4.2.4. Navigation Details .................................................................................................... 12 4.2.5. Source and Mechanical Department Details ........................................................... 13

5. LIST OF KEY PERSONNEL .............................................................................................. 14 5.1. ONBOARD PERSONNEL ...................................................................................................... 14 5.2. OFFICE SUPPORT PERSONNEL........................................................................................... 14

6. FIELD INFORMATION AND OBSERVATIONS ................................................................ 15 6.1. TIME STATISTICS ............................................................................................................... 15 6.2. PRODUCTION STATISTICS .................................................................................................. 17 6.3. PRODUCTION TIME FOLLOW UP. ......................................................................................... 18 6.4. DAILY SUMMARY ............................................................................................................... 19

6.4.1. Obstructions / Installations in the Field .................................................................... 22 6.4.2. Traffic / Shipping Lanes ........................................................................................... 22 6.4.3. Fishing Activity ......................................................................................................... 22 6.4.4. Seismic Interference and Time Share ..................................................................... 22 6.4.5. Environmental Obstacles......................................................................................... 22 6.4.6. Operational Observations ........................................................................................ 22

7. HSE SUMMARY................................................................................................................. 23 7.1. OBSERVATION CARDS DURING THE SURVEY: ...................................................................... 24 7.2. PRODUCTION-LOG............................................................................................................. 25

8. SHIPMENT LIST ................................................................................................................ 26 8.1. SHIPMENT DETAILS............................................................................................................ 27

9. CREW LISTS...................................................................................................................... 29

10. TOWING CONFIGURATION.............................................................................................. 30 10.1. TOWING OFFSET DIAGRAM............................................................................................. 31 10.2. STREAMER SYSTEM DESCRIPTION.................................................................................. 32 10.3. STREAMER LAYOUT ....................................................................................................... 34

11. SOURCE CONFIGURATION............................................................................................. 35 11.1. SOURCE SYSTEM DESCRIPTION...................................................................................... 35

11.1.1. Gun Controller Specifications............................................................................... 36 11.1.2. Source Layout ...................................................................................................... 37 11.1.3. Array Listing ......................................................................................................... 38



11.2. 3040 CU-INCH PULSE RESPONSE AND SPECTRUM AT 6M. ............................................... 39 12. INSTRUMENTATION ROOM SYSTEM DIAGRAM........................................................... 40

13. NAVIGATION AND POSITIONING SYSTEM DESCRIPTION.......................................... 41 13.1. SYSTEM CONFIGURATION............................................................................................... 41

13.1.1. Navigation Hardware and Software ..................................................................... 41 13.1.2. System Timing...................................................................................................... 41

13.2. SURVEY POSITIONING METHOD USED............................................................................. 41 13.3. SURFACE POSITIONING .................................................................................................. 42

13.3.1. Vessel Navigation................................................................................................. 42 13.3.2. Float Navigation ................................................................................................... 43

13.4. STREAMER AND SOURCE POSITIONING ........................................................................... 43 13.4.1. Streamer Compasses .......................................................................................... 43 13.4.2. Gyro Compass ..................................................................................................... 43

13.5. AUXILLIARY NAVIGATION SENSORS................................................................................. 43 13.5.1. Echo Sounder....................................................................................................... 43

14. SURVEY PRE-PLOTS ....................................................................................................... 44 14.1. GEODETICS ................................................................................................................... 44 14.2. PREPLOT....................................................................................................................... 44

15. NAVIGATION SYSTEMS VERIFICATION AND MONITORING....................................... 46 15.1. GYRO MONITORING ....................................................................................................... 46 15.2. GPS MONITORING......................................................................................................... 46 15.3. RGPS HEALTH CHECKS ................................................................................................ 46

16. NAVIGATION PROCESSING ............................................................................................ 47 16.1. THE FGPS SEISPOS SYSTEM......................................................................................... 47 16.2. FIRST LINE TEST DATA ................................................................................................... 47 16.3. INITIAL QC..................................................................................................................... 47 16.4. POST-PROCESSING FLOW .............................................................................................. 47 16.5. FINAL QC...................................................................................................................... 47 16.6. WATER DEPTH PROCESSING.......................................................................................... 48

17. OBSERVATIONS ............................................................................................................... 48 17.1. NAVIGATION SUMMARY .................................................................................................. 48

17.1.1. DGPS Systems- ................................................................................................... 48 17.1.2. Echo Sounder....................................................................................................... 48 17.1.3. Gyro...................................................................................................................... 48 17.1.4. RGPS ................................................................................................................... 48

17.2. PROCESSING AND QC SUMMARY.................................................................................... 48 18. INSTRUMENTATION AND QC SYSTEM DESCRIPTION ................................................ 49

19. INSTRUMENTATION AND QC TESTS............................................................................. 50 19.1. START-UP TESTS ........................................................................................................... 50 19.2. ADDITIONAL CLIENT TESTS.............................................................................................. 50 19.3. DAILY INSTRUMENT AND SENSOR TESTS ......................................................................... 50

19.3.1. Seal tests performed daily.................................................................................... 50 19.3.2. Seal system and streamer test results ................................................................. 51 2.3.3. End of job test .............................................................................................................. 51 19.3.3. QC Processes ...................................................................................................... 52 19.3.4. Production tape logs............................................................................................. 52

20. ONBOARD QC PERSONNEL AND SYSTEM................................................................... 53 20.1. ONBOARD QC PROCESSING GEOPHYSICISTS.................................................................. 53



20.2. ONSHORE QC PROCESSING SUPPORT ........................................................................... 53 20.3. SEISMIC PROCESSING HARDWARE DESCRIPTION ............................................................ 53 20.4. SEISMIC PROCESSING SOFTWARE DESCRIPTION............................................................. 53

21. ACQUISITION QUALITY CONTROL ................................................................................ 54 21.1. INTRODUCTION .............................................................................................................. 54 21.2. QC PROCESSING OBJECTIVES ....................................................................................... 54 21.3. PARAMETER TESTING .................................................................................................... 54 21.4. QC PROCESSING SEQUENCE ......................................................................................... 54 21.5. VELOCITY ANALYSIS....................................................................................................... 55 21.6. BRUTE STACK................................................................................................................ 56 21.7. QC PROCESSING STEPS ................................................................................................. 57 21.8. NOISE RECORD AND CHANNEL RMS GRAPH ................................................................... 59 21.9. AMBIENT NOISE - SHOT VS CHANNEL RMS DISPLAY ....................................................... 61 21.10. NEAR TRACE DISPLAY.................................................................................................... 63 21.11. AUXILIARY CHANNEL QC................................................................................................ 64 21.12. SHOT RECORD DISPLAYS............................................................................................... 66 21.13. NAVIGATION PROCESSING.............................................................................................. 67

22. ENCOUNTERED PROBLEMS........................................................................................... 68 22.1. SWELL NOISE................................................................................................................. 68 22.2. AUTOFIRES/MISFIRES ..................................................................................................... 70 22.3. TURN NOISE .................................................................................................................. 70 22.4. REFLECTION ENERGY..................................................................................................... 71 22.5. SPIKY CHANNELS........................................................................................................... 72 22.6. NOISE HISTORY DISPLAY................................................................................................. 74 22.7. RMS HISTORY DISPLAYS ................................................................................................ 74

23. CONCLUSION.................................................................................................................... 76

24. APPENDICES .................................................................................................................... 79 24.1. SEGY BRUTE STACK HEADERS ..................................................................................... 79 24.2. SHIPMENTS ................................................................................................................... 80 24.3. QC LINE LOG................................................................................................................. 80

APPENDIX 0 HYDROGRAPHICAL DATA GRAPH .............................................................. 82

APPENDIX 1 NAVIGATION SYSTEMS & DIAGRAMS......................................................... 83 DGPS REFERENCE STATIONS ...................................................................................................... 83 ANTENNA OFFSETS ...................................................................................................................... 86

APPENDIX 2 NAVIGATION PROCESSING LOG ................................................................. 88

APPENDIX 3 CALIBRATIONS AND TESTS......................................................................... 90

APPENDIX 4 MEDEVAC PLAN........................................................................................... 102

APPENDIX 5 CONTACT LIST ............................................................................................. 103



1. Survey Information and Objectives Santos have agreed to enter into a service contract for the purpose of acquisition of a marine seismic 2D survey of app.733 km. full fold along the North West coast of Tasmania, Australia. The survey was located on the North-West coast of Tasmania. Water depth in the survey area was a minimum of 80 meters to a maximum of 1949 meters. The seismic acquisition was performed by CGGVeritas using the survey vessel Pacific Titan, owned by Swire Pacific Offshore. Source volume was 3040 cubic inches at a depth of 6 m. Streamer length was 6000 m, towed at a depth of 8 m. Recording length was 6 sec. Chargeable production started on the 4th March at 18:37 and completed 12th March at 04:30 local Australian east coast time. All lines were pre-fixed with SOSN08C where C denotes block C, A survey sequence number was used as the last 3 characters in the name, unique for each line in the survey. Sequence number started from 001. Upon survey completion, Pacific Titan recovered all in water equipment and departed the area.



2. Survey Area (T/48P KING ISLAND 2D - SOSN08C)

2.1. Preplot Map



2.2. Postplot Map.



3. Contract Work Order CONTRACT

Client: SANTOS Ltd Vessel(s): Pacific Titan Job number: 6374 Bid number: Client contract number/ref: Name: Southern Margins, Tasmania Area: North West Tasmania and King Island, -Australia Type of survey: 2D Towed streamer Area or total km's: 733km approximately Line heading: Variable Number of lines: 17 Line Length: Variable Acquisition method: 2D Single Streamer, Single Source Estimated start date (yyyy-mm-dd): 4 March 2008 Estimated duration: 1 week QHSE checklists completed:

STREAMER Type of streamer: Sercel Seal, digital streamer, Solid Streamer Number of streamers: 1 Separation: N/A Streamer length: 6000 metres. Number of channels: 480 Group interval: 12.5 metres Streamer depth and tolerance: 8 metres +/-1 metre Water depth: 80 - 1950

RECORDING Instrument type: Sercel Seal Sercel Seal Record length: 6 seconds. Sample rate: 2 milliseconds Recording filter, Hi-cut: 206Hz @ 276dB/Oct Recording filter, Low-cut: Analog (built in) 3Hz @ 6dB/Oct, Digital Low-Cut: IN (4.7Hz

effective) Filter type: Butterworth Pre-amplifier gain: 0dB, (1600mV) Tape format: SEGD 8058 Recording media: IBM 3590 Tape copy: 2 data sets of Field Tapes to be delivered



SOURCE Source type: Bolt Long Life, Tuned array Source controller: Seamap Gunlink 2000 Number of sources: 1 Volume per source: 3040 cu in Source depth and tolerance: 6 metres +/- 1.0 metres Source pressure and tolerance: 2000 psi +/- 10% Source length: 15 metres Number of sub-arrays per source: 3 Sub-array separation: 10 metres Flip/flop: N/A Shot point interval per shot: 25 metres Shot point location: Near fields to be recorded? Yes Source firing specifications: +/- 1.2 milliseconds

4. Vessel Description

4.1. Vessel Specifications – Pacific Titan M/V Pacific Titan is capable of doing both 2D and 3D seismic data acquisition work. For 2D work the vessel can tow 12 000 meters streamers. For 3D seismic work the vessel can do dual source/dual streamer (2X8000m) or dual source/three streamer (3X4000m) operation providing high quality 2D and 3D seismic data for the industry. Features include a SEAL-24 system configurable for multiple streamers. Options include real-time seismic processing, acoustic source positioning, and acoustic streamer positioning and onboard navigation. The following are general specifications for the vessel and seismic equipment on board.



Vessel Information Description: 6,400 BHP Seismic Survey Vessel Classification: A1 (E) Seismic Research AMS ACCU Built: Japan, 1982, Conversion later in Seattle Flag: Singapore Call Sign: 9V5935 IMO No. : 8208385 Dimensions Length, overall: 64.5 m Length BP: 55.2 m Breadth, moulded: 18.5 m Depth, moulded: 6.0 m Summer Draft: 5.18 m GRT: 3211.0 NRT: 963.0 Machinery Main engines: 4 x 1,600 BHP, 6Z-ST Total 6,400

BHP Propellers in Kort Nozzles Bow Thruster: 420 BHP Yanmar 6LAAL-DTN 5

tones thrust, CP propeller Rudders: Trailing Flap Generator: 3 x 280 kW Yanmar 6LAAL-DTN Speed: 4 x engines, Max: 12.0 kts/14 tons/day Service: 10 kts/10 tons/day 2 x engines: 9.0 kts/9 tons/day

Electronics Radar: Furuno FR 1505 Mk III ARPA Secondary Radar: Furuno FR 1510 Mk III GPS: Furuno GP 30 Echo Sounder: Simrad ED-162 and Simrad EA 600 Communications: G.M.D.S.S. Skanti SSB, VHF,

Inmarsat C 456304540 / 456304550

Weather Fax: Furuno 207 Satcom B: NERA Inmarsat phone/fax Tel (870) 356 304 510 Vsat: Instrumentroom +47 51 40 76 11 Party Chief +47 51 40 76 12 Chiefs office +47 51 40 76 13 Bridge/Fax +47 51 40 76 14 High Speed data link: NERA Inmarsat system: Tel (870) 356 304 510 Miscellaneous: Fire monitoring and detection to all work areas USCG approved sewage treatment plant. Incinerator, macerator and compactor. Six man inflatable Man-overboard boat on quick release davit LSA equipment for 45 persons excluding survival suits. Foam deluge system covering streamer winches, streamer storage reels and helideck. P.A. System Stainless steel gun deck. Helideck rated for Bell 212 or equivalent with lights. FRC: 21 feet Nor Power.



4.2. Seismic Particulars

4.2.1. Streamer and Sensors Details Item Description Type Amount Remark

Streamer 24 bit, digital distributed electronic

Sercel solid SEAL

Up to 12 km active 64 mm diameter

Depth Control Digicourse 5011 22 Located every 300 m along the streamer

Buoyancy Foam Retrievers Concorde 500 7 1 every 900 meters Streamer skin Polyurethane Solid 3.5 mm thickness Hydrophones Sercel Radial Piezoelectric Sercel 12-element radial Section Length 150 m Section diameter 64 mm Lead-in Sercel Armoured 350 m. Group Length 12.5 m No of hydrophones per group

8 Sercel 12 element radial.

790 nF Group capacitance 21.5 V/Bar sensitivity

Max number of channels 2000 12.5 m @ 2ms

Telemetry data link

Dual twisted quartet AWG 22

Aux. Data link 4 twisted pair AWG 22 Power lines Dual AWG 14 Connectors 28 points AWG 16

4.2.2. Recording System Details Item Description Type Amount Remark Acquisition SEAL V 5.0 Sercel 1 Max 10 000 channels Format SEG D Vs1 De-multiplexed Recording IBM via Argus IBM computer 4 3590 cartridges Computer Sun Blade 2000 2 Bird Controller Digicourse 22 Graphic user I/F Unix/Seapro X11 Ultra 5 Sercel Terminal Sun 21” 2 Sampling ¼,1/2,1,2,4 ms Aux channels 36 Max 255 Plotter 24” Veritas 1 On-line Printer A4 Label Printer A4 Logs, tests etc. Network Ethernet Twisted pair Category 5 TCP/IP Argus Raid Intel Xeon Raid drive Data storage/Backup



4.2.3. Seismic QC Details Item Description Type Amount Remark

Online Qc SEAPRO QC Vs 4.0 Sercel 1

Online seismic QC, fully Integrated with recording system.

Offline Qc ProMAX Landmark 1 Brute stacks, etc Plotter 24” Veritas 1

Computer Supermicro Dual Xeon 3.2 Ghz 1

Terminals Sun 21” 2 Graphic user interface Linux RedHat

Remote X terminal Sat. link Network Ethernet Twisted pair Category 5 TCP/IP

Product options

High resolution seismic record display. Pre-filtering of seismic data. Attribute calculation First break picking. Signal to noise ratio. Seismic trace energy. Noise level. Seismic trace frequency analysis. Single trace displays. Attribute db generation

4.2.4. Navigation Details Item Description Type Amount Remark Navigation online Concept Systems Spectra Navigation offline FGPS Seispos Work Stations PC workstations Shuttle 2 Network Ethernet Twisted pair Category 5 TCP/IP PC workstation Sony Shuttle Printer HP Laser Network to 12”

Compasses Digicourse 5011 22 Every 300 meter along the streamer + more in the front and tail end.

Streamer positioning RGPS Geotrack 220 1 Tracks

Source Positioning RGPS Geotrack 320 3 1 on each sub-array.

Acoustics N/A

Data logging UKOOA P2/94 P1/90 3590, CD-Rom, Online

hard disk Echo Sounder Simrad EA600 12 KHz & 200 KHz Gyro Simrad HS 50 GPS Gyro Autopilot Robertson AP9 Mk III Steering RobTrack STS500 Helmsman Steering display Spectra Sony Shuttle 1 Located on the bridge



4.2.5. Source and Mechanical Department Details Item Description Type Amount Remark

Acoustic source Long Life Bolt 6 acoustic positions per sub-array 8 sources per sub-array

Hanging Plates Multiwave design Multiwave Chambers 40 – 300 cu. inch.

Cluster 8-ea clusters Bolt 3 clusters on the outmost sub-arrays, 2 on the centre sub-array

Near field hydrophones

2540 I/O 3 per sub-array

Depth/pressure Sensors 2527B I/O 3 per sub-array

Source Varying configuration Multiwave / Bolt Single

/dual Typical: 90-110bar output

Compressors Frick TDSB 355 3 Capacity 3 x 2000 cu.ft/min Aerial JGA4 3 Caterpillar Prime mover 3 1 for ea. set of Frick/Aerial Source controller Gunlink 2000 Seamap 32 guns, expandable Solenoid Power Supply

Gunlink 2000 Seamap 25 ms fire pulse width

Deflector Multiwave 6 foils 2 Gun Winches Single Odim remote ctrl. 5 Slip-ring, Air Streamer winches Single Odim remote ctrl. 4 Each 9000 m (50 mm)

Spooling Device Marine Project Development Linear 4 Spooling on each streamer

winch individually Tow Points Odim Flexible 4 Winch Control Odim 2



5. List of Key Personnel

5.1. Onboard Personnel

POSITION Crew 1

Party Chief Sigurd Østerud

Captain Theodore Strockyj

Chief Engineer Carl Sayers

Chief Observer Allan Beatie

Shift Leader Observer Jun Lamabas

Chief Navigator Paul Stafford

Shift Leader Navigation Christopher Hernandez

Chief Mechanic Roger Steffensen

Shift Leader Mechanic Ronaldo Morales

QC leader Steffi Schwarz

Client Representative William Lloyd

5.2. Office Support Personnel

POSITION NAME

Vice President Operation Christian Brige

Operation Manager Serge Laigre

Instrument Manager Joar Vestrheim

Navigation Manager Rafael Bouraly

Mechanic Manager Steinar Hovland

QC support Christophe Massacand



6. Field Information and Observations

6.1. Time Statistics

Time Distribution M/V Pacific Titan Client : (6734) Seboa - Group Shoot - Australia Survey: 550 11 89 07 06 00 Area: 2D (Project SEBOA) Date: 03.03.2008 - 11.3.2008 (GMT Time)



SEBOA Group Shoot, Australia Final Survey Report

Survey: Santos, T48P Area: South East Basin, Offshore Australia


6.2. Production Statistics



6.3. Production Time Follow up.



6.4. Daily Summary All daily logs are in GMT time.

Tue, 11 Mar 2008, week 11 Finished up production on the Santos project with around 58 km production today. No problems today. We finished production at 06:07 GMT (17:07 local time) we then recovered gear and did a TS dip before transiting to the TAP Oil project. Weather is good again today with high pressure over us. Midnight fuel balance 842.385 cubic M, Consumed 13.934 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 12 x toolbox meetings (8 x Dept. Handovers, 1 x gun retrieval, 1 x streamer retrieval, 1 x door recovery, 1 x TSA dip) 0 x FMM Training (Lifting incident presentation) 5 x Observation cards Mon, 10 Mar 2008, week 11 Good production with around 192 km production today. No real problems today. Weather is good again today with promising forecast for the next few days. We estimate finishing the prospect if all goes well by 18:00 local time on the 11th. Midnight fuel balance 856.319 cubic M, Consumed 14.694 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 8 x toolbox meetings (8 x Dept. Handovers) 1 x FMM Training (Lifting incident presentation) 2 x Observation cards Vers3 updated added midnight SP Sun, 09 Mar 2008, week 11 We had around 113 km production today. We finally finished line 23 and the reduced volume test line 27. We had a weather front pass over us last night causing choppy seas. No real problems with noise on streamer. Weather good again today. We estimate finishing the prospect if all goes well by late tomorrow local time. Midnight fuel balance 871.013 cubic M, Consumed 13.451 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 10 x toolbox meetings (8 x Dept. Handovers, 1 x gun retrieval, 1 x gun deployment) 0 x FMM Training 3 x Observation cards 1 x CSV (Incinerator operation) 2 x MSV Sat, 08 Mar 2008, week 10 Not much production today again due to whales and technical problems. We started production on line 23 again at 03:17 GMT but had to abort due to whales. We then tried to use the time circling to do some umbilical repairs. This took longer than expected and turned into a major job causing over 12 hours of technical down time. We attempted line 23 again and once again encountered whales causing a total shutdown. It was decided this time we had enough km to keep and then circled to continue line 23 with a cable length overlap. Weather has deteriorated a bit with 25 kts winds and choppy seas. Expected to get worse over the next day as a low front passes. . Midnight fuel balance 884.464 cubic M, Consumed 14.5 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 10 x toolbox meetings (8 x Dept. Handovers, 1 x gun retrieval, 1 x gun deployment) 0 x FMM Training



4 x Observation cards Vers 2 Abort time changed from 20:30 to 20:29 on seq 16 Fri, 07 Mar 2008, week 10 No production today. We started production on line 23 at 00:14 GMT and after 8.5 kilometers we had to abort due to whales. Around again and after 8.5 kilometers on line 23 we aborted due to shallow bird. This bird was found to have jammed wings and motor failure. The streamer was retrieved to change it out. This was put down as 9.95 hours of technical down time. Once the streamer was back out, we shot line 23 again. After we finished the line the decision was made not to accept the SPs 1401 onwards due to bird 11 going out of spec intermittently. This resulted in going all the way back to the beginning because the accepted segment was only 10 km. The work boat was sent to investigate bird 11 and 12 and found both had been pulled out of collars by fishing gear. Weather very good at the moment with very little wind but long swell. Midnight fuel balance 898.964 cubic M, Consumed 13.6 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 13 x toolbox meetings (8 x Dept. Handovers, 1 x streamer recovery, 1 x streamer deployment, 1 x gun retrieval, 1 x gun deployment, 1 x work boat launch) 0 x FMM Training 8 x Observation cards vers3 code change to standby for Santos under 12 hours Thu, 06 Mar 2008, week 10 Good production today with around 141 km. We had one part of line 21 with no fathometer data when depths went over 1000 m. We consulted with client and used the first break picks from near trace data to fill in this missing portion for the P190. Weather still good. Midnight fuel balance 912.564 cubic M, Consumed 14.253 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 8 x toolbox meetings (Dept. Handovers) 2 x FMM Training (lifting and handling) 7 x Observation cards Wed, 05 Mar 2008, week 10 Good production today with around 156 km. Seq 4 ended early by 34 SP's due to proximity of SNA. First good SP on line 13 (seq 7) was 1183 due to the same reason causing cable bend at start of line. Production on line 13 continues over midnight GMT. Weather still fairly good. Expected to pick up a bit tomorrow. Midnight fuel balance 926.817 cubic M, Consumed 15.0 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 6 x toolbox meetings 1 x FMM Training (lifting and handling) 3 x Observation cards Tue, 04 Mar 2008, week 10 Today we finished deployment and mobilization for the group shoot Santos prospect. Production began at 07:37 GMT (18:37 local). The weather became a bit choppy but did not significantly affect the streamer and we shot at 8m streamer depth. We had 10 or 11 bad shots due to timing or spread errors on first two lines combined. Feathering looking good. Midnight fuel balance 941.817 cubic M, Consumed 15.0 cubic M HSE Total personnel onboard: 35 (16 Maritime, 17 Seismic, 2 client) 6 x toolbox meetings 1 x General muster drill 3 x Observation cards 0 x Safety Induction tours vers2 due to added prod before midnight



Mon, 03 Mar 2008, week 10 Continued Crew Change, bunkers and provisions during the morning. We also had the job startup meeting onboard the Titan with clients, Santos, TAP Oil, and CUE Energy. We started the mobilization of the Group shoot at 07:05 GMT (18:05 local time) by steaming for the Santos prospect area. Equipment deployment began at 17:45 GMT. The weather is very good at the time being. Wind did pick up to around 25 kts towards the end of the day. The outlook is still good for the next day or two. Midnight fuel balance 956.817 cubic M, Consumed 6.0 cubic M, 350.00 cubes received. HSE Total personnel onboard: 29 (18 Maritime, 11 Seismic) 6 x toolbox meetings 0 x Observation cards 4 x Safety Induction tours CHASE BOAT: The chase vessel Shandara, communicated and performed it’s duties well. We had trouble at times raising her on the radio. I actually had to call on the cell phone once to confirm the locations of cray pots near the start of a line. Good job done by all during the survey.



Field Information and Encountered Problems

6.4.1. Obstructions / Installations in the Field No obstructions of any kind observed within the survey area other than whales and some cray pots which the local fishing community moved for us when requested.

6.4.2. Traffic / Shipping Lanes No commercial shipping traffic was observed thought out the duration of the survey.

6.4.3. Fishing Activity Majority of fishing activity was in waters less than 200m. All fishing gear was dragged or recovered by the chase boat if it affected the survey and the owner was notified. Generally little activity noticed throughout the survey.

6.4.4. Seismic Interference and Time Share No seismic interference was observed during the survey.

6.4.5. Environmental Obstacles There were several line aborts during the survey due to whale sightings within the 2 km zone.

6.4.6. Operational Observations We had one day of major down time due to a shallow bird requiring the recovery of the streamer and also one gun umbilical which needed swapping over.



7. HSE Summary No environment incidents during the Santos survey. We performed the requested audit with checklist of points at the end of the survey to make sure all points that were required were performed according to the environmental specifications. Prior to the Survey start all new crew members were given a safety introduction tour to get familiarized with the vessel’s safety details. Prior to all safety critical operations, i.e. deploying and recovery of seismic equipment, a “Toolbox Meeting” was held to verify and eliminate any hazards related to the operation. Each operation has its own dedicated procedures, laid down in the CGGVeritas QHSE system and these were carefully followed throughout the survey. HSE summary stats for the Santos project:




7.1. Observation Cards during the Survey:




7.2. Production-Log



8. Shipment List

Performa invoice nr. Date Job# Description Receiver Destination

PT-2008-021 6374 Santos T48P 2D Primary (Seq 1 - 22) Fugro Seismic Imaging, Perth Australia

PT-2008-022 6374 Santos T48P 2D Copy (Seq 1 - 22) Santos, Adelaide Australia



8.1. Shipment Details





9. Crew Lists



10. Towing Configuration

180.00 m.

146.20 m. 145.00 m.

COS

CNG active 12*50m stretch + module

33.80 m. 168.62 m 116.33 m.

6.25 m.

Spectra SCN CMPLayback = -252.50 m

NRP

325.00 m.

Principal Distances: Principal Offsets: Used as:NRP-Stern 33.80 m. COS-CNG 145.00 m. Key:Stern-COS 146.20 m. NRP-CMP -252.50 m NRP Navgation reference point (centre of mast @ sea level)Stern-CNG 291.20 m. COS Centre of sourceNRP-COS 180.00 m. NRP-CNG 325.00 m. CNG Centre of near group (Trace # 001)Centre near group derived from Seal manuals = 6.25m from coupling CDP Common depth point

NTRP Near trace reflection point

Offset from NRP

M/V Pacific Titan Towing Dimensions/Offset Diagram

Spectra SCN Layback



10.1. Towing Offset Diagram

Pacific Titan General Towing arrangement

Centre of Source

RGPS pod

RP Reference PointVessel Centre Stern at sea level

RP

10m

10m

33.8m

180m

187m

H

P

A

C

I

F

I

C



10.2. Streamer System Description

Streamer System Parameters

Number of Streamers 1 Type of Streamer Seal Solid Streamer Length 6000m Number of channels 480 Groups per Section (150 m) 12 Group Intervals 12.5 m (no overlap) Active Group Array Length 12.5 m Outside Diameter 55 mm Solid Streamer Material Outer 3.5mm Polypropylene Normal maximum towing tension 55.6kN Ultimate breaking at 278kN Connectors (Pins) 28 Channels per Module 60 at 2 ms Data Transmission Link Dual twisted Quad AWG 22 Power +/- 360 V DC Leakage 30 mA differential circuit breaker Near Offset (centre source – centre near group) 145m nominal Streamer Depth 8m +/- 1.0m Number of Front 50 m Stretch Sections 2 (85 mm diameter) Number of Tail 50 m Stretch Sections 1 (50 mm diameter) Number of Compasses per Streamer 23 (within digibirds) Number of Depth Sensors per Streamer 23 (within digibirds)

Trace allocation Near Far Aux Streamer 1 1 480 Auxiliary (in AXCU) a1 – a30



Hydrophone Parameters

Hydrophone Specification Sercel 12 element radial

No of Channels per Section 12

No of Hydrophones per Channel 8 in parallel

Active Length of Channel 12.5m

Channel Centre Spacing 12.5 m under a 1000daN load

Hydrophone Spacing 1.78m

Low Frequency Cut 3 Hz Nominal Sensitivity, without electronics @ 1 bar @ 20°C 20 V/bar

Nominal Hydrophone Sensitivity 21.5 v/bar Capacitance per Group 790 nF +/-10% at 22°C Minimum Leakage Resistor 500 Mohm under 50 V



10.3. Streamer Layout 6000m

Item Position S/N RDU Bird Collar SRD Collar Trace N.O WeightsDCXU 696502Slip ring

PORT AFT REELLead-in n/aSHS 1350HAU 124HESE 1861 13489 10HESE 1665 1 15797 10HESA 1332SSAS 01 30497 2 34113 12090 1-12 6SSAS 02 30362 3 29978 13-24 2SSAS 03 30552 4 30495 25-36 5SSAS 04 30613 37-48 3SSAS 05 30352 5 30672 13491 49-60 3LAUM 01 775SSAS 06 30522 61-72 5SSAS 07 30529 6 27772 73-84 3SSAS 08 30251 85-96 5SSAS 09 30531 7 29983 97-108 5SSAS 10 30515 109-120 2LAUM 02 513SSAS 11 30394 8 40854 12083 121-132 4SSAS 12 30521 133-144 3SSAS 13 30136 9 30256 145-156 4SSAS 14 30578 157-168 7SSAS 15 30553 10 29096 169-180 4LAUM 03 515SSAS 16 30504 181-192 5SSAS 17 30447 11 30334 13493 193-204 3SSAS 18 30160 205-216 4SSAS 19 30454 12 15076 217-228 4SSAS 20 30572 229-240 4LAUM 04 731SSAS 21 30508 13 30246 241-252 6SSAS 22 30495 253-264 3SSAS 23 30494 14 30137 13490 265-276 7SSAS 24 30249 277-288 5SSAS 25 30443 15 31507 289-300 2LAUM 05 737SSAS 26 30152 301-312 2SSAS 27 30571 16 31053 313-324 5SSAS 28 30567 325-336 4SSAS 29 30557 17 22740 13492 337-348 4SSAS 30 30502 349-360 3LAUM 06 734SSAS 31 30582 18 30329 361-372 4SSAS 32 30583 373-384 3SSAS 33 30576 19 30511 385-396 2SSAS 34 30569 397-408 5SSAS 35 30574 20 30674 36201 409-420 4LAUM 07 908SSAS 36 30584 421-432 4SSAS 37 30581 21 31120 433-444 5SSAS 38 30590 445-456 3SSAS 39 30580 22 40035 36206 457-468 4SSAS 40 30588 23 30359 469-480 4TAPU 01 104TES 01 1703Tailbuoy 01



11. Source Configuration

11.1. Source System Description

Source Parameters

Source Controller Gunlink 2000

Number of Sources 1

Number of Sub-Arrays (Strings) per Source 3

Array Length 14.7m

Sub-Array Separation 10m

Source Width 20m

Source Separation n/a

Source Volume 3040 Cubic inches

Number of Hydrophones per String 6

Number of Depth Transducers per String 3

Number of Pressure Transducers per String 1

Number of Guns per String Strings 1 & 3 = 9 / String 2 = 8

Number of Clusters per String Strings 1 & 3 = 3 / String 2 = 2

Airgun Type Bolt, 1500 & 1900 Long Life

Operating Pressure 2000 PSI

Depth of Guns 6.0 m +/- 1.0m

Peak to Peak Amplitude 106.2 barm

Primary to Bubble Ratio 23.0

Gun Controller Description The Gunlink 2000 Seismic Source Control and Acquisition System is the first phase of Seamap’s range of new generation seismic gun controller systems. The system uses the latest high speed micro processors to provide onboard firing control and sensor timing monitoring, continuous monitoring of near field phones and interrogation of depth and pressure sensors. In addition the system monitors the voltage and current of the firing pulses applied to the gun solenoids allowing the user to monitor variations in the performance of the guns and improve maintenance schedules. An innovated Graphical User Interface (GUI) makes use of the latest advances in software design to provide the operator with maximum information on the operation and performance of the system without the clutter of text. An internal database maintains records of all system statistics and the data can be accessed via the in built web server using standard web browser programs. To further reduce operator fatigue, the system draws the operator’s attention to gun misfires, auto-fires and other faults by use of voice alerts issued from the system speakers.



11.1.1. Gun Controller Specifications

Channels available

Monitored Variables

Gun Fire time Near field Hydrophone Data Depth Sensor value Gun air pressure Value Solenoid coil current

Controlled Variables Gun Fire time Gun Firing pulse length and Voltage

System Timing 0.01 ms Fire Detect Window 120 ms Synchronization Mode Automatic Fire Detect Method Sensor Fire Time Pick Method Peak detect Near Field Hydrophone S.I. 0.1 ms Near Field Hydrophone Res. 16 Bit Software Version 2.5.2

Main Computer

System Network Switch

Timing control Unit (TCU) Gun Controller Unit

(GCU)

Gun Controller Unit

(GCU)

Gun Line Patch

cabinets



11.1.2. Source Layout



11.1.3. Array Listing Total active volume: 3040 in3 Nominal pressure 2000 psi.

GUN# GUN TYPE

Dist X (m)

Dist Y (m)

Dist Z (m) Volume

Active / Spare

Sub-array

# 1 1500LL 0 10.5 6 250 Active 1 2 1500LL 0 9.5 6 250 Active 1 3 1900LLX 3.5 10.5 6 150 Active 1 4 1900LLX 3.5 9.5 6 150 Spare 1 5 1900LLX 6.3 10.5 6 100 Active 1 6 1900LLX 6.3 9.5 6 100 Active 1 7 1900LLX 9.1 10 6 150 Active 1 8 1900LLX 11.9 10 6 70 Active 1 9 1900LLX 14.7 10 6 40 Active 1

10 1500LL 0 0.5 6 300 Spare 2 11 1500LL 0 -0.5 6 300 Spare 2 12 1500LL 3.5 0.5 6 300 Active 2 13 1500LL 3.5 -0.5 6 300 Active 2 14 1900LLX 6.3 0 6 100 Active 2 15 1900LLX 9.1 0 6 150 Active 2 16 1900LLX 11.9 0 6 100 Active 2 17 1900LLX 14.7 0 6 70 Active 2 18 1500LL 0 -9.5 6 250 Active 3 19 1500LL 0 -10.5 6 250 Spare 3 20 1900LLX 3.5 -9.5 6 150 Active 3 21 1900LLX 3.5 -10.5 6 150 Active 3 22 1900LLX 6.3 -9.5 6 100 Active 3 23 1900LLX 6.3 -10.5 6 100 Spare 3 24 1900LLX 9.1 -10 6 150 Active 3 25 1900LLX 11.9 -10 6 70 Active 3 26 1900LLX 14.7 -10 6 40 Active 3



11.2. 3040 Cu-Inch Pulse Response and Spectrum at 6m.



12. Instrumentation Room System Diagram



13. Navigation and Positioning System Description

13.1. System Configuration

13.1.1. Navigation Hardware and Software

System Hardware (Type and Serial No.) Software version CONCEPT Spectra RTNµ (30/207P & 30/208P) Spectra 10.9.01.10 IBM E Server Workstations Red Hat ELWS3.6 External Header N/A Labo Header Acoustic System N/A TS-meter Saiv AS STD/CTD model SD 204 Echo sounder Simrad EA600

13.1.2. System Timing Spectra issued closures to the source firing system and recording system 50 milliseconds before the predicted time of peak pressure. Spectra received the time break back from the GunLink source controller and all Spectra system positions are output for this time.

An additional trigger was issued from spectra 450 milliseconds after time zero, this was sent to the recording system as a timing verification. The trigger was 5 milliseconds in duration.

13.2. Survey Positioning Method Used This survey was carried out using CGGVeritas standard mode of operation for single streamer/single source surveys. Positioning of the vessel was by 3 Single/Dual frequency differential GPS systems using a delivery of differential correction data in RTCM 104 format and recorded in the P2/94 files. The sources were positioned relative to the vessel using a network consisting of rGPS units mounted on sub-arrays 1, 2 and 3.

The centre near group of the streamer was positioned by a combination of compass heading units and nominal offsets from the vessel.

The centre last group of the streamer was positioned using a network consisting of a rGPS system unit mounted on the tail buoy, a nominal offset to the tail buoy and a streamer mounted compass heading unit.

The streamer shape was modelled by 23 Digicourse series 5011 combined streamer depth control and magnetic compass units on the streamer. Least squares condition equations for the streamer assuming circular arcs between compasses and relating the tracking nodes, compasses, tension corrected distances between compasses, rotation bias and scale were used to compute scale, rotation and individual compass corrections. The streamer shape was then computed by the circular arc method.



13.3. Surface Positioning

13.3.1. Vessel Navigation

Summary

The SPM2000 with SPM 5.16 software provides single and dual frequency GPS positioning, using corrections generated by the Fugro Starfix network of reference stations broadcast via geostationary communication satellites.

The standard single frequency service is Starfix and the dual frequency services are Starfix.Plus, Skyfix.XP and Starfix.HP (High Performance).

Both, Starfix and Starfix.Plus are sub-metre level accuracy services. Starfix-Plus is the recommended service for equatorial regions where the standard service cannot achieve metre level accuracy during any peak of the solar cycle.

Starfix.HP is the Fugro positioning service with decimetre level accuracy at distances up to 1000 km from Starfix.HP reference stations making this system ideal for offshore applications requiring very precise horizontal and vertical positioning. The HP engine is now aided with the Starfix.XP engine to provide more robust and accurate position.

Skyfix.XP is Fugro’s Positioning service based purely on State Space corrections.

Differential Correction Systems: Fugro Skyfix via Spot Beam (OCSAT) satellite and Fugro Starfix via Inmarsat (IOR) and NTrip (Corrections received via VSAT) All systems had the same accuracy and were set to have the same weight in the solution. Fugro Multifix is a multiple reference station DGPS system tailored for the specific needs of seismic surveying. Algorithms combine reference station data and pseudo range measurements into the best position estimates. By employing a correlation model for weighting the multiple range corrections in a least squares estimation process, the optimum pseudo-range corrections are obtained. W-testing and F-testing techniques detect and reject correction outliers. Quality control is based upon UKOOA’s recommended DGPS quality indicators - the precision and reliability of the fix are displayed as an Error Ellipse and Marginally Detectable Errors (MDE). The differential corrections were transmitted to, and received on-board the vessel by three independent means and provided a high degree of redundancy to ensure continuous vessel positioning.

Further information is given in Appendix 1.

Although Selective Availability was turned off in May 2000 differential corrections are still required to provide a high quality continuous vessel position. Less frequent updates are required however.



13.3.2. Float Navigation Source and Tailbuoy surface navigation was provided by Seatex Seatrack relative GPS. The in-sea units incorporated a GPS receiver and interfacing for direct data transmission of the raw satellite pseudo-range data via UHF link to the vessel. On board the vessel, the raw pseudo-range data from the float unit was matched with simultaneously received data at the vessel’s GPS receiver to compute a vector describing the location of the float unit relative to the vessel from which the float position was derived. Relative positioning CEP was better than 2 m.

13.4. Streamer and Source Positioning

13.4.1. Streamer Compasses 23 series 5011 Digicourse combined magnetic compass and streamer depth controllers were attached to each streamer. All compasses were used for positioning and shaping the streamers. Compass Sampling Rate = 2 second Averaging constant = 14 seconds Compass performance was monitored on a line-to-line basis throughout the acquisition phase of the survey.

13.4.2. Gyro Compass The gyrocompasses used during the survey were: Gyro 1 - Simrad HS50 GPS Gyro 2 - Tokyo Keiki MK.ES The gyro correction values as computed during the mobilisation calibration were as follows: Gyro 1 - plus 1.35 degrees Gyro 2 - plus 2.20 degrees

13.5. Auxilliary Navigation Sensors

13.5.1. Echo Sounder The echo sounder speed of sound was set to 1500 m/s. A draught correction of zero was entered in the echo sounder. Due to the proximity of the survey and the depths encountered the 12KHz transducer was used as the master echo sounder.



14. Survey Pre-plots

14.1. Geodetics

Satellite/Survey Datum Datum Name: WGS84 Spheroid Name: WGS84 Semi Major Axis: 6378137.0 Inverse Flattening: 298.2572236 Projection Type: Universal Transverse Mercator 55° S Origin Longitude: 147.000E Origin Latitude: 0000.00N False Easting: 500,000.00E False Northing: 10,000,000.00N

14.2. Preplot H0100Survey Area Tasmania H0101General Survey Details Preplot 2D Santos T48P H0200Date of Survey N/A H0201Date of Issue 28 Feb 2008 H0202Tape Version P1/90 H0203Line Prefix H0300Client Santos H0400Geophysical Contractor CGGVeritas H0500Positioning Contractor CGGVeritas H0600Position Processing CGGVeritas H0800Co-ordinate Location Preplot Sail Line Locations H1100Receiver Groups per Shot 0 H1400Surveyed Datum WGS84 WGS84 6378137.000 298.2572236 H1401Transformation to WGS84 0.0 0.0 0.0 0.000 0.000 0.000 0.0000000 H1500Post Plot Datum N/A H1501Transformation to WGS84 N/A H1600Transformation H14 to H15 N/A H1700Vertical Datum SL Echo Sounder H1800Projection Type 2Universal Transverse Mercator H1900Projection Zone 55S H2000Grid Units 1Meters 1.000000000000 H2001Height Units 1Meters 1.000000000000 H2002Angular Units 1Degrees H2200Long of Cent Meridian 1470000.000E H2301Grid Origin 0000000.000N1470000.000E H2302Grid Coords at Origin 00500000.00E10000000.00N H2401Scale Factor 0.9996000000 H2402Lat/Long of Scale Factor 0000000.000N1470000.000E H2600SHOT POINT INTERVAL 25.00 m H2600LINE GENERATION MODE Great Circle H2600NUMBER OF 2D LINES 17 H2600TOTAL 2D LINE LENGTH 733.12 kilometres H2600AVG. LINE LENGTH 43.12 kilometres H2600 H2600 Line Details H2600 H2600 Format is:



H2600 LINENAME(A12) SEGMENT(I2) FSP(I6) LSP(I6) AZIMUTH(F7.3) LENGTH(F8.1) H2600 H2600 S OS N08C-01 1 1001 3049 058.500 051200.0 H2600 S OS N08C-02 1 1001 3596 148.524 064875.0 H2600 S OS N08C-03 1 1001 2884 057.887 047075.0 H2600 S OS N08C-04 1 1001 3554 147.163 063825.0 H2600 S OS N08C-05 1 1001 2492 057.853 037275.0 H2600 S OS N08C-06 1 1001 5723 157.879 118050.0 H2600 S OS N08C-07 1 1001 2474 058.922 036825.0 H2600 S OS N08C-09 1 1001 2211 060.006 030250.0 H2600 S OS N08C-11 1 1001 2272 062.295 031775.0 H2600 S OS N08C-13 1 1001 2186 063.315 029625.0 H2600 S OS N08C-15 1 1001 2016 065.049 025375.0 H2600 S OS N08C-17 1 1001 1939 065.627 023450.0 H2600 S OS N08C-19 1 1001 1975 065.163 024350.0 H2600 S OS N08C-21 1 1001 2624 062.803 040575.0 H2600 S OS N08C-23 1 1001 2634 062.595 040825.0 H2600 S OS N08C-25 1 1001 2774 062.323 044325.0 H2600 S OS N08C-27 1 1001 1939 065.627 023450.0 H2600 VS OS N08C-01 1001405512.20S1435905.11E 246090.05465739.0 VS OS N08C-01 3049404040.80S1443004.03E 288810.65493984.3 VS OS N08C-02 1001410627.31S1441238.79E 265791.05445550.0 VS OS N08C-02 3596413618.22S1443701.64E 301433.35391329.3 VS OS N08C-03 1001410041.49S1440142.00E 250106.05455709.0 VS OS N08C-03 2884404706.78S1443002.58E 289115.65482080.1 VS OS N08C-04 1001410515.50S1441510.19E 269253.05447877.0 VS OS N08C-04 3554413411.13S1444003.98E 305548.45395364.5 VS OS N08C-05 1001410248.20S1440733.31E 258442.05452076.0 VS OS N08C-05 2492405203.06S1443001.03E 289340.05472941.7 VS OS N08C-06 1001403711.91S1440505.41E 253411.05499342.0 VS OS N08C-06 5723413612.55S1443705.02E 301506.75391506.4 VS OS N08C-07 1001410921.41S1440731.11E 258791.05439947.0 VS OS N08C-07 2474405903.01S1443000.31E 289693.65459990.2 VS OS N08C-09 1001410953.72S1441120.01E 264159.05439125.0 VS OS N08C-09 2211410141.99S1443001.50E 289861.85455088.0 VS OS N08C-11 1001411327.10S1441248.31E 266428.05432610.0 VS OS N08C-11 2272410526.48S1443253.69E 294078.15448279.0 VS OS N08C-13 1001411427.91S1441506.19E 269698.05430837.0 VS OS N08C-13 2186410715.09S1443400.86E 295738.95444973.2 VS OS N08C-15 1001411715.89S1441746.19E 273584.05425773.0 VS OS N08C-15 2016411127.73S1443413.47E 296250.45437189.7 VS OS N08C-17 1001412056.12S1441752.09E 273933.05418984.9 VS OS N08C-17 1939411541.42S1443309.69E 294985.05429324.3 VS OS N08C-19 1001412309.39S1441913.19E 275945.05414933.0 VS OS N08C-19 1975411736.76S1443502.94E 297719.65425840.8 VS OS N08C-21 1001412958.80S1441121.12E 265390.05401958.0 VS OS N08C-21 2624411954.77S1443713.12E 300864.45421668.1 VS OS N08C-23 1001413311.91S1441401.82E 269307.05396122.0 VS OS N08C-23 2634412259.88S1444001.68E 304936.55416065.6 VS OS N08C-25 1001413909.08S1441126.09E 266058.05384989.0 VS OS N08C-25 2774412758.28S1443937.65E 304627.15406847.4 VS OS N08C-27 1001412056.12S1441752.09E 273933.05418984.9 VS OS N08C-27 1939411541.42S1443309.69E 294985.05429324.3



15. Navigation Systems Verification and Monitoring

15.1. Gyro Monitoring

Dockside verification was performed in Balikpapan, Indonesia over 07-08th August 2007. An additional 1 sided calibration took place in Singapore on February 2008

The gyro verification results are in Appendix 3

15.2. GPS Monitoring Health checks onshore were carried out to verify that the installation was satisfactorily operational (data reception, transmission, processing and Logging were verified) and that operational settings were correct. Each system used, including duplicates was verified.

The onshore Health Check results are in Appendix 3

15.3. RGPS Health Checks The last RGPS verifications were held at Loyang Shipyard and onboard using a zero base line technique. Previously verifications took place at Semayang Wharf, Balikpapan, Indonesia over the 07-08th of August 2007.

The onshore Health Check results are in Appendix 3



16. Navigation Processing

16.1. The FGPS Seispos System SeisPos is an off-line navigation QC and post-processing system for 2D and 3D streamer surveys supplied by Fast Geophysical Processing Services. It runs under various Windows operating systems and has a graphical front end. A relational database management system is used for data storage. SeisPos is capable of automatic filtering and gating of the observations in addition to manual editing, before new adjustments are calculated. There is a comprehensive set of QC tools available such as graphical plots of any node or observation parameters and combinations of these, comparison of online and processed P1/90.

16.2. First Line Test data A first-break analysis was performed during the first line and to confirm the nominal offsets for the front end of the streamer. An offset shot test line was also performed after any streamer re-deployment.

16.3. Initial QC Initial QC consisted of on-line monitoring of the systems and of producing an end of line QC report utilising the Spectra QCN (Quality Control Node). The report was generated as a PDF document. If any discrepancies were found, they would be further investigated and any problems were noted in the navigation line-logs. The report included comparisons between the systems, plots of network reliability, SMA (Semi Major Axis), MDE (Mean Detectable Error) and TS-plots of compasses, depths and source separation.

16.4. Post-processing Flow The lines were post processed using CGGVeritas standard 3D processing flow consisting of the following stages: - Import P2/94 to database and check for header changes. - Check for missing shots and perform shot edits. - Update a-priori SD’s and magnetic declination if required. - Pre-process data applying standard gating and filtering, hand-edit any remaining observation spikes. - Compass calibration and bias check. - Network adjustment - Processing QC report generation. - Export final P1/90 - QC of final P1/90 - Comparison of online and final P1/90

16.5. Final QC Final QC was performed during the post processing and consisted of checking the various reports and plots generated by SeisPos, checking consistency of logs and P1/90 QC and comparison. Any discrepancy was noted in the processing log.



16.6. Water Depth Processing The recorded water depth data was corrected for vessel draught, speed of sound and finally the data was tidally corrected using a tide file supplied from the client All three corrections were carried out in post-processing.

17. Observations

17.1. Navigation Summary All systems performed well throughout the survey. Each systems performance is described in further detail below.

17.1.1. DGPS Systems- Occasional drop out of data generated by SPM 2. SPM 1 remained stable throughout the survey and thus always provided 2 solutions.

17.1.2. Echo Sounder The 12 kHz transducer worked well throughout the survey. The 200 kHz transducer was not output due to the fact that the vast majority of the survey was acquired in depths of over 300m. During seq 11 for around 7.5 km, at depths greater than 1000m the echo sounder failed to output data owing to gates being incorrectly set. The hole in the depth data was filled using first break analysis generated from processing. Depth data generated by the echo sounder either side of the hole was used to calibrate the depth data generate by the first break analysis that was used to fill the hole. 17.1.3. Gyro The primary and secondary gyro performed well during the survey.

17.1.4. RGPS All RGPS systems performed well throughout the survey.

17.2. Processing and QC Summary No problems recorded



18. Instrumentation and QC System Description

Unit Type Manufacturer Software version Recording Sercel Seal Version 5.1.14

Argus Profocus: Raid disk and data management Version 4.0

Tape drives IBM 3590E Plotter Versatech 24inch Onboard QC Seal Seapro QC and ARGUS QC Version 4.0 Source Controller Seamap Gunlink 2000 Version 2.4.2 Auxiliary Systems 48 channel (Sercel AXCU) Bird Controller Digicourse DMU + PC Sys 3v01 Bird Type Digicourse 5011E Sys 3v01



19. Instrumentation and QC tests

19.1. Start-up tests Before the beginning of the survey started, and after the streamer was deployed, a complete set of instrument/sensors tests were performed. These tests were as follows: Instrument tests 1 Harmonic distortion 2 System noise 3 Common mode rejection ratio 4 Gain error/ phase error 5 Cross talk Sensor tests 6 Hydrophone capacitance 7 LF cut-off 8 Leakage resistance At the start of the survey a complete set of instrument tests were performed and sent to the processing centre together with the seismic data. The results of the Start of Job Instrument/Sensor tests were: Channels 21, 277 & 377 failing Capacitance, Channel 277 failing Low Frequency Cut off and channels 181 & 242 failing Hydrophone Leakage.

19.2. Additional client tests Polarity tests were carried out at the start of contract and verified on Promax. Channel 59 had polarity reversed.

19.3. Daily Instrument and Sensor tests The daily instrument and sensor tests consisted of the same 8 tests which were used to verify the Seal and Streamers performance at the start and throughout the contract. Results were printed out daily and also recorded to tape at start-up, interim monthly and end of contract. These tests were run daily to confirm that the Seal recording system and streamer performance were in specification. The series of tests results showed the recording system to be in specification throughout the survey. The overall system performance was stable throughout the survey with test performance repeatable from day to day.

19.3.1. Seal tests performed daily



The following page shows the tests performed daily and their results. Instrument tests 1 Harmonic distortion 2 System noise 3 Common mode rejection ratio 4 Gain error/ phase error 5 Cross talk Sensor tests 6 Hydrophone capacitance 7 LF cut-off 8 Leakage resistance

19.3.2. Seal system and streamer test results Streamer 1

System tests Sensor tests

Date Local HDSys

noise CMRRGain err

X talk odd

X talk even Cap

LF cut-off Leakage Remarks

04-Mar-08 OK OK OK OK OK OK 3 1 2Ch. 21, 277 & 337 failed capacitance. Ch. 277 failed cut-off.

Ch. 181 & 242 failed leakage.

05-Mar-08 OK OK OK OK OK OK 3 1 1Ch. 21, 277 & 337 failed capacitance. Ch. 277 failed cut-off.

Ch. 181 failed leakage.

06-Mar-08 OK OK OK OK OK OK 4 1 1Ch. 21, 190, 277 & 337 failed capacitance. Ch. 277 failed cut-

off. Ch. 181 failed leakage.

07-Mar-08 OK OK OK OK OK OK 4 2 1Ch. 21, 190, 277 & 337 failed capacitance. Ch. 181 & 277

failed cut-off. Ch. 181 failed leakage.

08-Mar-08 OK OK OK OK OK OK 3 0 0 Ch. 21, 91 & 337 failed capacitance.

09-Mar-08 OK OK OK OK OK OK 3 0 0 Ch. 21, 91 & 337 failed capacitance.

10-Mar-08 OK OK OK OK OK OK 3 0 1 Ch. 21, 91 & 337 failed capacitance. Ch. 242 failed leakage.

11-Mar-08 OK OK OK OK OK OK 3 0 1 Ch. 21, 91 & 337 failed capacitance. Ch. 242 failed leakage.

2.3.3. End of job test At the end of the survey a complete set of instrument tests were performed. These tests were as follows: Instrument tests 1 Harmonic distortion 2 System noise 3 Common mode rejection ratio 4 Gain error/ phase error 5 Cross talk Sensor tests 6 Hydrophone capacitance 7 LF cut-off 8 Leakage resistance The SOJ, Interim Monthly and EOJ tests listed above were recorded to tape, and sent to the processing centre together with the Seismic data. The result of the End of Job Instrument/Sensor tests were: Channel 21, 91, 337 failing Capacitance, Channels 242 failing Hydrophone Leakage. The overall Seal and Solid streamer system performance was stable and repeatable throughout the survey.



19.3.3. QC Processes Seismic Observer QC displays Seal system QC displays showing shot records and rms residual noise were used to monitor seismic data shot by shot. RMS levels were colour scaled to give good visual assessments to the operator of sea swell and ship noise effects on the streamer. QC products and processing sequence A Promax system was in use during the survey to further monitor the quality of the Seismic data, and to produce Gathers, Brute and Raw stacks.

19.3.4. Production tape logs Client Santos BOX 1Area South East Basin, Offshore Australia

Survey 2D, T48P Vessel M/V Pacific Titan

Job # 6374Date Line Name Tape Seq FF LF FSP LSP Comments

04 March 2008 SOSN08C-01-001 1 1 979 2526 981 2526 SOL04 March 2008 SOSN08C-01-001 2 1 2527 3169 2527 3169 EOL04 March 2008 SOSN08C-03-002 3 2 979 2526 979 2526 SOL04 March 2008 SOSN08C-03-002 4 2 2527 3005 2527 3004 EOL04 March 2008 SOSN08C-05-003 5 3 979 2526 981 2526 SOL05 March 2008 SOSN08C-05-003 6 3 2527 2613 2527 2612 EOL05 March 2008 SOSN08C-07-004 7 4 979 2526 981 2526 SOL05 March 2008 SOSN08C-07-004 8 4 2527 2561 2527 2560 EOL05 March 2008 SOSN08C-09-005 9 5 979 2332 981 2331 SOL / EOL05 March 2008 SOSN08C-11-006 10 6 979 2311 981 2310 SOL / EOL05 March 2008 SOSN08C-13-007 11 7 979 2307 981 2306 SOL / EOL06 March 2008 SOSN08C-15-008 12 8 979 2137 981 2136 SOL / EOL06 March 2008 SOSN08C-17-009 13 9 979 2100 981 2099 SOL / EOL06 March 2008 SOSN08C-19-010 14 10 979 2096 981 2095 SOL / EOL06 March 2008 SOSN08C-21-011 15 11 979 2526 981 2526 SOL06 March 2008 SOSN08C-21-011 16 11 2527 2745 2527 2744 EOL07 March 2008 SOSN08C-23-012 17 12 979 1343 981 1342 NTBP07 March 2008 SOSN08C-23-013 18 13 979 1350 981 1349 NTBP07 March 2008 SOSN08C-23-014 19 14 979 2526 981 2526 NTBP07 March 2008 SOSN08C-23-014 20 14 2527 2675 2527 2674 NTBP08 March 2008 SOSN08C-23-015 21 15 979 1264 981 1263 NTBP08 March 2008 SOSN08C-23-016 22 16 979 1374 981 1371 Incomplete08 March 2008 SOSN08C-23-017 23 17 1230 2675 1230 2674 SOL / EOL09 March 2008 SOSN08C-27-018 24 18 979 2100 981 2099 SOL / EOL09 March 2008 SOSN08C-25-019 25 19 979 2526 981 2526 SOL09 March 2008 SOSN08C-25-019 26 19 2527 2895 2527 2594 EOL09 March 2008 SOSN08C-02-020 27 20 979 2526 981 2526 SOL09 March 2008 SOSN08C-02-020 28 20 2527 3717 2527 3716 EOL10 March 2008 SOSN08C-04-021 29 21 979 2526 981 2526 SOL10 March 2008 SOSN08C-04-021 30 21 2527 3675 2527 3674 EOL

Client Santos BOX 2Area South East Basin, Offshore Australia

Survey 2D, T48P Vessel M/V Pacific Titan

Job # 6374Date Line Name Tape Seq FF LF FSP LSP Comments

10 March 2008 SOSN08C-06-022 31 22 979 2526 981 2526 SOL10 March 2008 SOSN08C-06-022 32 22 2527 4074 2527 4074 Continued10 March 2008 SOSN08C-06-022 33 22 4075 5622 4075 5622 Continued10 March 2008 SOSN08C-06-022 34 22 5623 5844 5623 5843 EOL11 March 2008 35 1 12 SOJ / EOJ Tests

End of Job Santos T48P



20. Onboard QC Personnel and System

20.1. Onboard QC Processing Geophysicists 3rd Mar 2008 - 2nd Apr 2008 Steffi Schwarz CGGVeritas, Chief Field Geophysicist Dennis Jerome Aquino CGGVeritas, Field Geophysicist

20.2. Onshore QC Processing Support Ronny Tømmerbakke, Support Geophysicist. Cathrine Myrmehl, Support Geophysicist Christophe Massacand, Chief Operations Geophysicist.

20.3. Seismic Processing Hardware Description Machines : 1 x Supermicro, built on SC833T-R760 Chassis

(Dual Core Xenon 2x3.2GHz CPU, 8Gb RAM)

1 x Win XP SP2 PC Hard Disk Drives : 1.6Tb Disk Monitors : 4 x 19in LCD Monitors Tape Drives : 2 x IBM 3590 tape drives

Plotters : 1 x Isys V24 24in Thermal Plotter (B&W)

20.4. Seismic Processing Software Description Processing software : ProMAX 2D version 2003.12.1 Operating System : Red Hat Enterprise WS 3.0 Update 6

Plotting software : ZehPlot Express 4.7.0



21. Acquisition Quality Control

21.1. Introduction This report provides a summary of the steps taken for the onboard seismic data QC for this survey. Information important for the onshore processing of this data is either contained within this document, or its location is referenced. The SEBOA survey is comprised of several 2D seismic surveys for the SEBOA consortium (Santos, 3D Oil, Bass Straits Oil Company, Cue Energy Resources, Eagle Bay Resources, Exoil and Tap Oil). The survey sites are located offshore South East Basin and Bass Strait Basin in Australia and cover around 10,900 sq kms. This report covers the Santos survey of block T48P. Acquisition parameters for the project are the following:

• 1 streamer x 6000m, • single source, • 25m SP interval, and • 6sec record length.

21.2. QC Processing Objectives The main objective of the onboard QC processing was to identify problems associated with the data acquisition and recording. This included the assessment of noise in the data on a line by line basis in order to give an overall impression of the data quality. Various QC methods, including RMS noise displays, single and multi-trace displays, gun hydrophone channels and stacks were used to assess compliance with various acceptance criteria and to isolate any other acquisition issues. The general aim of the QC processing was not to attenuate noise but to show the data as it was recorded, or how it would be presented to the processing centre. A brute stack was produced for every line with minimal processing to enable a thorough QC of the data onboard. In addition to brute stack processing, gun hydrophone channels were checked to QC the performance of the source, near trace and Shot vs. Channel RMS displays were generated and examined to identify any noise problems.

21.3. Parameter Testing Parameter testing consisted of choosing suitable parameters on the first sequence, along with NMO mutes, and post stack scaling for the displays, and checking that these parameters remained appropriate throughout the survey.

After intial cable deployment and after each subsequent redeployment, a near-offset test was performed using the gun closest to the centre of the source to ascertain the actual distance from the sorce to the centre of the first receiver group.

21.4. QC Processing Sequence



Data was recorded by the Observer department in duplicate onto 3590 tape cartridges (10Gb capacity). One 'primary' tape set and one 'copy' tape sets were generated. Upon completion of a line, the ‘original’ (or ‘primary’) tape was read to confirm the integrity of the data on tape. All SEG-D data on the primary tape was extracted and written to the ProMAX system disk. A listing of the field files (FFID), shot point numbers (SP) and number of channels was printed to clearly identify any lost shots or shots with missing navigation headers. The data included 480 seismic channels and 30 auxiliary channels ( -1 to –30). Informative auxiliary channels are Aux1 - System Start, Aux2 - Time Break, Aux4 - Waterbreak, Aux13 to Aux30 - Gun Near Field Hydrophones. Also recorded were the start of line (SOL) and end of line (EOL) noise records. Seismic data, noise records and auxiliary channels were input with a record length of 6000ms, and a 2ms sample interval was used in the acquisition. The cable length was 6000 meters with hydrophone group separation of 12.5 meters, and shotpoints were recorded at 25m intervals. A bulk shift static correction was applied to the data to correct for the 50ms instrument delay of the recording system. For QC purposes a nominal 2D geometry was applied to all the seismic trace data. The resulting offset / CDP binning information calculated was then loaded into the seismic trace headers. The data was re-sampled from 2 ms to 4 ms using a minimum phase, high fidelity anti-alias filter applied prior to resample. Further data reduction involved 2-to-1 Marine Trace Decimation after differential NMO, which increased the receiver spacing from 12.5 to 25 meters. To balance the amplitudes of the shot record, true amplitude recovery using a t square correction was used and applied to the whole shot record. Band pass filtering (Ormsby 6-8-90-120) was also applied to the data, prior to NMO and stacking. Water bottom picks were automatically generated and manually QC’ed for the near channel. Trace editing involved killing any bad traces or shots based on Observer log comments and results of the QC.

21.5. Velocity Analysis Brute velocities were picked for every line at a 2 km interval using ProMAX’s interactive velocity analysis package. This comprised of a semblance display with RMS stacking velocity graph and interval velocity graph, CDP super gather panel and function stack panels. To improve the signal to noise ratio, super gathers were formed by combining 15 adjacent CDP gathers. Stack panels were created from these 15 CDP’s using 31 functions varying +/- 35% from the regional velocity function of the first two sequences. Thereafter, the velocity functions of the nearest adjacent line shot in the same direction, were used as a guide.



Figure 21-1: Velocity analysis for seq. 011. Graphical user interface with semblance, super-CDP gather and function stacks. To speed up the on-screen velocity picking procedure, the velocity analysis displays were pre-computed. Normal move-out was applied to the gather to check that the events were lining up well. NMO corrected gathers were also displayed onscreen: both, at and between velocity locations, for further verification. Velocity tables for each sequence were exported to ASCII format.

21.6. Brute Stack Brute stacks were produced as soon as possible after each line and presented to the onboard client to assess the noise impact on the data. A straight mean vertical stack algorithm was used for CDP stacking, with a root power scalar for normalization of 0.5. A bulk shift static correction was applied post-stack to correct for the gun and cable depths. Filtering was limited to a 6-8-90-120 Hz Ormsby band-pass filter. The raw brute stacks were captured to jpg and plotted to paper.



Figure 21-2: Brute stack for seq. 002.

21.7. QC processing steps This section describes the quality control steps that were taken. This acquisition QC allows for the onboard processors to find, log and analyse any potential problems in conjunction with the other onboard departments, in order that the highest possible standards of acquisition are maintained.

The onboard QC includes a full set of quality controls used to detect seismic and positioning problems.



STEP DETAILS QC PROCEDURE/PRODUCT

Reformat to ProMAX internal format

Input full length record - 6000ms, 480 channels + 30 auxiliary channels

Check Job Listing for FFID/Shot numbering, Gun Seq, Main headers.

Check for missing data

Noise Record Start And End Of Line.

Ambient RMS Calculation

Check screen display and noise level

Screen capture SOL & EOL records

Noise History Append Noise Calculation to History Screen capture Noise History

– single display for entire project

Raw Shots Display Every 2km, 480 channels

6000ms

Check Channel Edits

Check Data Quality

Auxiliary Channel QC Create Aux Channel Gathers

Vertical Stack Gun Hydrophones for each Gun string

QC of Aux Channels

Check for autofires, gun timing, air leaks

Near Trace Display Select First Channel and Display Check record length, data quality

Screen capture

Shot vs Chan RMS Analysis

• Ormsby, Zero Phase, 4-8-90-120 Hz BPF applied.

• 2 Windows.

50-500ms & 5450-5950ms.

• Shot by shot Average Noise Calculation.

Check levels against job specs

Check for bad channels

Screen capture for both displays

RMS History Calculate Average for Sequence and append to RMS History File

Screen capture RMS History

– single display for entire project

Trace Decimation Flow • Input Raw Shots

• Apply Shot and Channel Edits based on Observer Logs and QC

• -50ms static shift for Instrument Filter Delay

• Ormsby, Minimum Phase, 4-8-90-120 Hz Band Pass Filter

• Apply 2D Nominal Marine Geometry

Decimated shot display

Every 1250 m shot display on screen Check shots

Velocity Analysis Every 4 km, Semblance,Gathers, Variable Velocity Percentage Stack Panels

Pick velocities every 2km

Velocity QC Start ProMAX Interactive Velocity QC and Editing tool.

Check velocity Field for Spikes and Picking errors. Display as Interval Velocities for additional QC

NMO gathers Every 2km NMO CMP gathers on screen Check moveout of primaries.



STEP DETAILS QC PROCEDURE/PRODUCT

Export Vels Export Velocity Table to ASCII Save ASCII Vel file

Stack RMS Flow Calculate water column RMS value for posting on top of the stack

Shot Stack Flow Calculate average RMS level of each shot over entire line, measured within a 5450-5950 window. Post in ProMAX database

QC for anomalous values

Screen capture

Channel Stack Flow Calculate average RMS level of each channel over entire line, measured within a 5450-5950 window. Post in ProMAX database

QC for anomalous values

Screen capture

Stack Flow • Input Decimated Shots

• Sort to CMP order

• Moveout with picked Velocity Field

• Surgical NMO mute

• 1/sqrt(n) fold compensated stack

• Apply Gun and Cable Statics

• Time square amplitude recovery

• Ormsby, Minimum Phase, 4-8-90-120 Hz Band Pass Filter

Check quality of stack

Check completeness of Stack and corresponding SPs, FFIDs and CDPs

Screen capture

Stack Plot Time Variable Amplitude Compensation QC of stack

SEG-Y stack Write to SEG-Y & QC Save deliverable file

Nav Merge QC Merge lead trace of each cable with P190. Calculate direct arrival time and display over Seismic Near Trace Gather.

Check that predicted Direct Arrival Time closely follows the seismic data. Check that all traces have merged successfully.

End of Job

21.8. Noise Record and Channel RMS graph The noise records were recorded at the start and end of every line, and displayed for QC. Channel RMS values were computed for all 480 channels over the entire record for noise analysis, and graphed above the display. For every sequence the noise record at SOL and EOL was displayed on screen and archived to GIF format.



Figure 21-3: Example Noise Record with Channel RMS levels annotated, seq. 011. Note noisy channel 265, and bend noise in the middle of the streamer. For each noise record a noise analysis is performed. The average ambient noise encountered in the noise records is recorded in the QC log.

Figure 21-4: Example of analysis of Noise Records for seq. 014 (NTBP). Swell noise is evident, exceeding 25μb and affecting about 10% of traces. Average Ambient RMS: 10.8μb.



21.9. Ambient noise - Shot Vs Channel RMS Display Colour displays of Shot vs. Channel RMS values were produced for the whole cable for every line to assess the ambient noise level and the channel quality. Raw data with a sample rate of 1 ms was used to calculate the RMS values for every channel on every shot.

RMS values were calculated from two windows, a shallow window of 50-500ms at the start of the record, and a deep window of 5450-5950ms at the end of the record. RMS values from all channels were averaged for each shot. They were displayed on the graph.

Figure 21-5: Shot gather with shallow and deep RMS analysis windows annotated.

For all RMS computations a scaling factor of 46.5 was used to convert from millivolts to microbars, the instrument sensitivity being 21.5 Volts/Bar.

The shallow and deep colour RMS displays were viewed on screen, and screen images were then saved as JPG files. The displays were used to show noise trends along the line such as swell noise, noisy/bad channels, bird noise, cable tug, front end noise, cable strikes, auto-fires and misfires, multiple interference,



etc. Noisy channels could be clearly identified and deteriorating channels could be spotted using this display. The on screen analysis also allowed the exact shot and channel location of any noise trend to be located and investigated. All suspicious shots were then examined in the raw shot display to find and edit noisy shot records.

The shallow window was overdriven for the first 50 channels and the deep window was overdriven from time to time, as can be seen on the plot below (red bar at top of display). This is due to the water depth of the survey area, and the impossibility of finding an adequate water column window at the top of the trace, free from the seismic impulse. Therefore it was impossible to determine average values of ambient noise from the rms displays.

At the end of the survey a composite display was created showing average RMS values per channel on a sequence-by-sequence basis.

ASCII format files of the ambient RMS can be found on the Deliverables CD as well as the QC log for the survey area

.

Figure 21-6: Deep RMS window for seq. 011. Note increased residual energy towards deeper end of prospect at



EOL.

Figure 21-7: Examples of Shallow rms window QC from seq. 011. The first 50 channels are dominated by direct arrival energy. Noise on trace 265 and swell noise are evident.

21.10. Near Trace Display The near traces were displayed on screen for every line in order to quickly determine any possible errors with acquisition, e.g. gun volume changes, bad records, time-break problems and any auto-fires not reported by the recording system. The near traces also provided a good indication of the geological conditions, including strength of the water bottom multiples, residual seismic multiple energy and swell noise contamination.



Figure 21-8: Near trace display, seq. 011.

21.11. Auxiliary Channel QC The 30 auxiliary channels (-1 to -30) loaded during the SEG-D read, were separated from the 480 data channels, stored in a separate data file, and used for on screen analysis. These records consisted of the time break, the water break, and 6 near-field hydrophones for each of the 3 sub-arrays.

Time break and water break channels were displayed as a single trace display on screen. The first 500ms from all 6 hydrophones within each sub-array were stacked vertically and displayed in order to evaluate the performance of the guns. This proved useful in distinguishing genuine gun problems from noise on the trace. The auxiliary channel displays were used to locate air leaks and autofires.



Figure 21-9: Timebreak QC (Auxiliary channel 1).

Figure 21-10: Waterbreak hydrophone QC (Auxiliary channel 4).



Figure 21-11: QC of vertically stacked near field hydrophones 1 to 6 on gunstring 1 (Auxiliary channels 13 to 18). Note annotation of gun pressures, missing header for SP 1174.

21.12. Shot Record Displays Shot records were band pass filtered (Ormsby 6-8-90-120) and balanced with a true amplitude gain recovery. They were displayed on screen at 51 shot point intervals for each line. Additional records were also examined on screen if an issue with acquisition was suspected, such as noise, residual seismic energy or auto-fires. The colour RMS displays were frequently used to pinpoint bad/suspicious shots, the shot gathers of which were subsequently investigated onscreen. Consistently noisy channels were also identified on the raw shot displays, and cross checked against the Observer Logs, which were modified if necessary.



Figure 21-12: Raw shots display, SP 1205, seq. 002. Note strong refraction multiples from the seabed on the longer offsets and noise on channel 265.

21.13. Navigation Processing In order to QC the navigation data, the final processed P190 navigation files were merged with the near traces for each line. The predicted first break time was computed using the water velocity. This was displayed overlaid on the near trace as seen below (in red), to enable QC of the consistency between the predicted and the recorded first breaks.



Figure 21-13: Navigation QC display.

22. Encountered problems

22.1. Swell noise Weather conditions over the survey period were varied. In general, the weather was good, with swell heights less than 2m. Swell bursts were seen on the raw shot records, typically affecting less than 10% of the traces, usually at a level below 25ub. Because of the high fold of coverage, this noise invariably stacked out, even with no noise attenuation processes applied to the data.



Figure 22-1: Shot gather of SP 1072 for seq. 019. Swell noise affecting approx 10% of traces is evident.

Figure 22-2: Brute stack for seq 019. Not noticeably affected by swell.



22.2. Autofires/misfires Overall, the guns performed well during the period of acquisition. Processing QC confirmed the guns’ performance. Autofires, misfires and air pressures were closely monitored. Ocassionally gunlink flagged shots with uncomplete or missing headers as autofires, which was closely investigated to ensure correctness. Gun delta errors, missing headers etc were marked both in the Observer Logs and in the QC logs. The QC procedures in place to check for autofires and other gun problems are descibed in section 21.11.

Seq Line

Bad Shots: MSP - missed SP (not fired); REC - not recorded SP or bad due to recording system; GAF - gun autofire; GTE - gun timing error >1.5ms; NOR - noise on record out of specs; NAV - nav error or missing nav header; SE -

spread error

1 SOSN08C-01-001 INC HEADER: 1543,1550,1580,2680 MSP: 2002,2009 SE: 2185,2186,2187 GTE: 2194,2195

2 SOSN08C-03-002 NO HEADER: 1744,1951,2482,2770 SE: 1744,1951,2117,2118,2770 3 SOSN08C-05-003 NO HEADER: 1983,2017 4 SOSN08C-07-004 MSP: 1512,1517,1519,1520,1521,1534,1535,1536,1537 SE: 1538,1539,1540 5 SOSN08C-09-005 NO HEADER: 1887 6 SOSN08C-11-006 MSP: 1231 NO HEADER: 1643,2050,2263 7 SOSN08C-13-007 NO HEADER: 1192, 2238 8 SOSN08C-15-008 NO HEADER: 1350,1659,1928 9 SOSN08C-17-009 INC HEADER: 1044,1468,1538,1774 10 SOSN08C-19-010 NO HEADER: 1118 11 SOSN08C-21-011 NO HEADER: 1325,1923,1994,2340,2491,2503 12 SOSN08C-23-012 13 SOSN08C-23-013 14 SOSN08C-23-014 15 SOSN08C-23-015 16 SOSN08C-23-016 NONE 17 SOSN08C-23-017 NO HEADER: 1425,1747 18 SOSN08C-27-018 NO HEADER: 1453,1721,1904 19 SOSN08C-25-019 NO HEADER: 1151,1818,2190 MSP: 1447 20 SOSN08C-02-020 NO HEADER: 1171,1449,1876,2274,3427,3432,3487,3498 21 SOSN08C-04-021 NO HEADER: 1441,2119,2473,2595,2980 MSP: 3443 22 SOSN08C-06-022 NO HEADER: 1207,1558,2460,3903,4041,4093,4132,4676,4991,5437, MSP: 4462

Figure 22-3: Shot edits section of the QC log listing bad shots.

22.3. Turn noise On occasion the streamer was still in turn when the SOL noise files were recorded, due to the line run-in being constrained by safe navigation areas, with associated noise up to 150ub. Notes regarding the sequences affected can be found in the QC logs.



Figure 22-4: SOL noise display of sequence 007. Streamer still in turn while SOL noise records were taken.

22.4. Reflection energy

In the prospect area residual energy extending into the next shot was occasionally observed. This resulted in increased RMS.



Figure 22-5: Residual reflection's energy on deep RMS shot vs. channel screen display of sequence 011.

22.5. Spiky Channels

The number of bad channels was less than 1.5% for the entire survey. Only one channel was strongly spiky.



reversed polarityfails instrumentation tests for more detailed info, see OBSERVER LINE LOGSnoisyspiking

Qseq001 21 59 181 242 265 277 337 7seq002 21 59 181 242 265 277 337 7seq003 21 59 181 242 265 277 337 7seq004 21 59 181 265 277 337 6seq005 21 59 181 265 277 337 6seq006 21 59 181 265 277 337 6seq007 21 59 181 265 277 337 6seq008 21 59 181 190 265 277 337 7seq009 21 59 181 190 265 277 337 7seq010 21 59 181 190 265 277 337 7seq011 21 59 181 190 265 277 337 7seq012seq013seq014seq015seq016 21 59 91 150 337 5seq017 21 59 91 150 337 5seq018 21 59 91 150 337 5seq019 21 59 91 150 337 5seq020 21 59 91 150 337 5seq021 21 59 91 150 242 337 6seq022 21 59 91 150 242 337 6

channel

Figure 22-6: Channel edits section of QC log listing bad channels.

Figure 22-7: Shot gather of SP 2545 for seq. 017. Note spiky channel 150.



22.6. Noise history display The following display shows the noise record history for all sequences, calculated from the SOL and EOL noise files. All channels for each noise record have been stacked together to a single trace, and these average channel values are annotated above the display.

Figure 22-8 : Noise history display for Sequences 001 to 022.

22.7. RMS history displays The following display shows the line average RMS for each individual channel on the streamer for Sequences 001 to 022, calculated from the shallow RMS window at 50 to 500 ms.



Figure 22-9: Shallow RMS history display for sequences 001 to 022. Showing some sequences affected by low amplitude swell noise and the first 50 channels dominated by direct arrival energy. The following display shows the line average RMS for each individual channel on the streamer for Sequences 001 to 022, calculated from the deep RMS window at 5450 to 5950 ms



Figure 22-10 History of deep RMS window. Showing some sequences affected by low amplitude swell noise and residual energy.

.

23. Conclusion Overall the data recorded on this survey was of good quality, helped by good acquisition conditions with low extraneous noise levels. A total of 22 sequences were shot, all of good quality.

Some swell noise was evident, although of low amplitude and affecting few traces. This noise did not affect the brute stacks significantly. The number of bad channels was less than 1.5% for the entire survey. The brute stacks showed good data quality and contained dipping surfaces, diffractions and multiples and good evidence of the captured geology including anticline structures and faulting planes. Signal penetration was good for the top half of the record, but poor beyond this, probably as a result of the high reflectivity of the intermediate layers. Strong multiples were observed.



Figure 23-1: Brute stack of sequence 007. A QC log in Excel format detailing quality control analysis of each line was delivered to the client at the completion of the survey.



Seq Line SHOTS STACK1 SOSN08C-01-001 Av. Ambient RMS: 6.9μb Good clean stack2 SOSN08C-03-002 Av. Ambient RMS: 5.4μb Good clean stack3 SOSN08C-05-003 Av. Ambient RMS: 8.4μb Good clean stack4 SOSN08C-07-004 Av. Ambient RMS: 7.1μb Good clean stack5 SOSN08C-09-005 Av. Ambient RMS: 7.7μb Good clean stack6 SOSN08C-11-006 Av. Ambient RMS: 6.3μb Good clean stack7 SOSN08C-13-007 Bend noise exceeding 150μb in mid-cable SOL. Av. Ambient RMS: 20.6μb Good clean stack8 SOSN08C-15-008 Av. Ambient RMS: 5.8μb Good clean stack9 SOSN08C-17-009 Av. Ambient RMS: 5.7μb Good clean stack10 SOSN08C-19-010 Av. Ambient RMS: 6.9μb Good clean stack11 SOSN08C-21-011 Bend noise up to 100μb in mid-cable SOL. Average ambient RMS of 9.8μb. Good clean stack12 SOSN08C-23-012 NTBP NTBP13 SOSN08C-23-013 NTBP14 SOSN08C-23-014 NTBP15 SOSN08C-23-015 NTBP16 SOSN08C-23-016 Av. Ambient RMS: 6.3μb Good clean stack17 SOSN08C-23-017 Av. Ambient RMS: 5.8μb Good clean stack18 SOSN08C-27-018 Av. Ambient RMS: 9.0μb Good clean stack19 SOSN08C-25-019 Av. Ambient RMS: 8.5μb. Swell noise up to 20μb affects the line from SOL to SP 1600. Good clean stack20 SOSN08C-02-020 Av. Ambient RMS: 5.7μb Good clean stack21 SOSN08C-04-021 Av. Ambient RMS: 5.4μb Good clean stack22 SOSN08C-06-022 Av. Ambient RMS: 5.5μb Good clean stack

Figure 23-2: Quality section of QC log.




24. Appendices

24.1. SEGY Brute Stack Headers The following SEGY Stacks EBDIC header template was used. Items marked in bold differ from line to line. C 1 CLIENT: SEBOA CONSORTIUM COMPANY: CGG VERITAS C 2 SURVEY: GROUP SHOOT 2D AREA: EAST BASIN, OFFSHORE AUSTRALIA C 3 SOSN08C-xx-xxx SP: xxxx-xxxx CDP: xxxx-xxxx C 4 DATA TRACES/STREAMER: 480 AUXILIARY TRACES/RECORD: 30 C 5 SAMPLE RATE: 2MS RECORD LENGTH: 6000ms C 6 RECORDING FORMAT: SEG-D 8058 REV 100 FILTERS: DIGITAL LOW CUT: ON C 7 ANALOG LOW CUT: 3 HZ 6 DB/OCTAVE HIGH CUT: 200 HZ 370 DB/OCTAVE C 8 STREAMER: SERCEL SEAL SOLID ACTIVE LENGTH: 6000 M C 9 GROUP INTERVAL: 12.5 M DEPTH: 8 M C10 SOURCE TYPE: BOLT AIRGUN VOLUME: 2130 CU IN C11 NO OF SUB ARRAY/SOURCE: 3 SUB ARRAY SEPARATION: 10 M C12 ARRAY PRESSURE: 2000 PSI ARRAY DEPTH: 6 M C13 C14 SEGY HEADER BYTES C15 Water Depth 185-188 C16 Line Number 189-192 C17 Cable 193-194 C18 Gun Sequence 195-196 C19 C20 SP ANNOTATED AT NEAR TRACE CDP C21 C22 PROCESSING: C23 C24 REFORMAT - SEGD TO PROMAX FORMAT C25 INSTRUMENT DELAY -50ms C26 SHOT AND CHANNEL EDITS BASED ON OBSERVER LOGS C27 BANDPASS FILTER, ORMSBY 6-8-90-120 HZ C28 RESAMPLE 2ms TO 4ms. HIGH FIDELITY ANTIALIAS FILTER C29 TRACE DECIMATION, 2:1, USING SINGLE NMO FUNCTION C30 TAR - T**2 CORRECTION C31 NMO, VELOCITIES PICKED AT 4 KM INTERVALS C32 CDP STACK, STRAIGHT MEAN SQUARE ROOT NORMALIZATION C33 GUN & CABLE STATIC 9ms C34 C35 CDP INTERVAL 12.5 METRES C36 C37 C38 MARCH 2008




24.2. Shipments

QC deliverables were included in the Primary and Copy Tape Shipments. The following QC products were shipped to the client at the end of the survey:

Shipment No: PT-2008-021

Date: 2nd. April 2008

Contents cover Sequences: 1 to 22 1 x CD containing SEG-Y Stack files (CGM format), various QC screen displays (JPG format), velocities (ASCII format) and ambient noise (ASCII format) files. Shipped to:

Fugro Seismic Imaging 69 Outram Street West Perth WA, 6005 Australia Attn: Phil Cook

Shipment No: PT-2008-022

Date: 2nd. April 2008

Contents cover Sequences: 1 to 22 1 x CD containing SEG-Y Stack files (CGM format), various QC screen displays (JPG format), velocities (ASCII format) and ambient noise (ASCII format) files. Shipped to:

Operations Geophysics Santos Ltd c/- Toll Priority Basement, 191 Pultney Street Adelaide, SA, 5000 Australia Attn: Nick Papanicolaou

24.3. QC Line log A QC log was maintained for the duration of the project to keep track of the workflows being run, shot edits, problems encountered and any processing comments. This log file has been written to DVD, and was included in the final data shipment to the client.




Client: SEBOA Consortium Members ProMAX QC Log

Seq Line Date Dir FCSP LCSP no. o

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s Notes

001 SOSN08C-01-001 4-Mar 238° 1001 3049 2049 4336 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 6/3 5/3 5/3 6/3 6/3 6/3 6/3 6/3 5/3 6/3 5/3 5/3 6/3 Complete, LCSP changed from 3169 after QC finished, hydrophone 26 dead, 27, 30 reversed

002 SOSN08C-03-002 5-Mar 058° 1001 2884 1884 4006 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 6/3 6/3 6/3 6/3 5/3 6/3 5/3 5/3 6/3 Complete, LCSP changed from 3004 after QC finished, hydrophone 26, 27 dead003 SOSN08C-05-003 5-Mar 238° 1001 2492 1492 3222 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 5/3 6/3 5/3 5/3 6/3 6/3 6/3 6/3 6/3 5/3 6/3 6/3 6/3 6/3 Complete, LCSP changed from 2612 after QC finished, hydrophone 26 dead004 SOSN08C-07-004 5-Mar 058° 1001 2440 1440 3118 5/3 6/3 5/3 5/3 6/3 6/3 5/3 5/3 5/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 Complete, LCSP changed from 2560 after QC finished, hydrophone 26 dead005 SOSN08C-09-005 5-Mar 239° 1001 2211 1211 2660 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 Complete, LCSP changed from 2331 after QC finished, hydrophone 26 dead006 SOSN08C-11-006 6-Mar 062° 1001 2310 1310 2858 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 Complete, LCSP changed from 2310 after QC finished, hydrophone 26 dead007 SOSN08C-13-007 6-Mar 242° 1183 2186 1004 2246 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 7/3 Complete, hydrophone 26 dead008 SOSN08C-15-008 6-Mar 065° 1001 2016 1016 2270 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 7/3 6/3 6/3 6/3 7/3 Complete, hydrophone 26 dead009 SOSN08C-17-009 6-Mar 245° 1001 1979 979 2196 6/3 7/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 6/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 Complete, hydrophone 26 dead010 SOSN08C-19-010 7-Mar 065° 1001 1975 975 2188 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 Complete, hydrophone 26 dead011 SOSN08C-21-011 7-Mar 245° 1001 2624 1624 3486 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 7/3 Complete, hydrophone 26 dead012 SOSN08C-23-012 NTBP 013 SOSN08C-23-013 NTBP014 SOSN08C-23-014 NTBP015 SOSN08C-23-015 NTBP016 SOSN08C-23-016 9-Mar 062° 1001 1371 371 980 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 Incomplete, line aborted early d/t whale sighting017 SOSN08C-23-017 9-Mar 062° 1372 2554 1183 2604 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 this line only: hydrophones 25-30 are gunstr 2, gunstr 3 no hydrophone data available018 SOSN08C-27-018 9-Mar 245° 1001 1979 979 2196 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 9/3 hydrophone 19 suspected leakage, 20, 21 no signal, 27, 29 killd d/t leakage019 SOSN08C-25-019 10-Mar 062° 1001 2774 1774 3786 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 Complete, hydrophone 20,21 no signal020 SOSN08C-02-020 10-Mar 328° 1001 3596 2596 5430 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 10/3 11/3 10/3 10/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 Complete, hydrophone 20,21 no signal021 SOSN08C-04-021 10-Mar 147° 1001 3554 2554 5346 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 Complete, hydrophone 20,21 no signal022 SOSN08C-06-022 11-Mar 337° 1001 5723 4723 9684 11/3 12/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 11/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 12/3 Complete, hydrophone 20,21 no signal

Area: East Basin, Offshore Australia Start Date: 03 March 2008Project: SEBOA 2D

Figure 24-1: QC processing part of the QC log detailing processing applied on a line-by-line basis.




Appendix 0 Hydrographical Data Graph Conductivity, pressure and temperature profiles are gathered using a (TS) Dips. Data and location information are included in the Supporting Documents section of the CDROM. Data from the Temperature and Salinity (TS) Dips are used to verify the water speed, which is continuously measured while recording data. Two TS Dip measurements were taken during the survey.

T/S DIPs, 6374 Santos

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

1500 1502 1504 1506 1508 1510 1512 1514 1516 1518 1520

Sound Velocity (m/s)

Dep

th (m

)

Done on 03rdMarch

Done on 11thMarch




Appendix 1 Navigation Systems & Diagrams

DGPS Reference Stations

WGS84

Ref. St. Name

No.

Latitude

Longitude

Height (m)

Brisbane 275 027° 28’ 38.488’’S 153° 01’ 37.352 ’’E 93.14

Bathurst 336 033° 25’ 46.879’’S 149° 34’ 01.969’’E 756.66

Ceduna 355 032° 07’ 03.049” S 133°41’22.851 “ E 7.27

Corbar 316 031° 29’ 57.430’’S 145° 50’ 20.346 ’’E 270.17

Melbourne 385 037° 47’ 59.264“ S 144° 57’ 39.311” E 67.33




Pacific Titan General Towing arrangement

Centre of Source

RGPS pod

RP Reference PointVessel Centre Stern at sea level

RP

10m10m

10m30m

33.8m

180m

187m

H

P

A

C

I

F

I

C




180.00 m.

146.20 m. 145.00 m.

COS

CNG active 12*50m stretch + module

33.80 m. 168.62 m 116.33 m.

6.25 m.

Spectra SCN CMPLayback = -252.50 m

NRP

325.00 m.

Principal Distances: Principal Offsets: Used as:NRP-Stern 33.80 m. COS-CNG 145.00 m. Key:Stern-COS 146.20 m. NRP-CMP -252.50 m NRP Navgation reference point (centre of mast @ sea level)Stern-CNG 291.20 m. COS Centre of sourceNRP-COS 180.00 m. NRP-CNG 325.00 m. CNG Centre of near group (Trace # 001)Centre near group derived from Seal manuals = 6.25m from coupling CDP Common depth point

NTRP Near trace reflection point

Offset from NRP

M/V Pacific Titan Towing Dimensions/Offset Diagram

Spectra SCN Layback



Antenna Offsets

33.8 m

15.6 m

5.0 m RP

4.2 m 8

7

12 10

RP0

7 & 8

12 10

See following page for detail of antenna mast

0



No Spectra ID X Y Z Description Cable Id0 V1 0 0 0 Vessel ref point

0 -33.8 0 Vessel centre Stern from ref point1 V1G1,V1G5 5.25 0 15.6 SPM1 XP,HP. Alison 940D 2 Red Rings2 3.15 0 15.6 Alison 940D 5 Red Rings3 motorola UHF Radio antenna4 V1G2, V1G3, V1G4 4.2 1.05 15.6 SPM2 XP,HP Multifix. Alison 940D 3 Red Rings5 Seatex Yagi VCU, UHF antenna 4 Red Rings6 Seatex Omni VCU, UHF antenna 1 Red Ring7 V1E1 -1.3 -5.8 -5 Simrad EA 600, 200kHz tranceducer8 V1E2 1.5 -6.1 -5 Simrad EA 600, 12kHz tranceducer9 Speedlan10 Runt 1 Trimble Bullet 11 sailor VHF Antenna 2 Green Rings12 V1GY1 Simrad GPS Gyro

Forward

1

Detail of Antenna Mast

5

6

3

4

2

1.05m1.05m

11



Appendix 2 Navigation Processing Log





Appendix 3 Calibrations and tests

Summary of Results for the Singapore Calibration Feb 2008-03-08 INTRODUCTION Subsea 7 (Singapore) Pte Ltd was appointed by CGG Veritas to carry out the following services for their vessel, MV Pacific Titan at Loyang Jetty, Singapore on 6 & 11 February, 2008:

• Gyro Calibration • DGPS System’s Verification • Tail Buoy System’s Verification

The results are summarized as follow:

a) Gyro Calibration – 6 February 2008

Heading @ 134 deg System C-O Std Dev

Gyro AD 100 0.27 deg 0.05 Gyro HS 50 1.40 deg 0.35

b) DGPS System’s verification – 6 February 2008

Easting Northing

System C-O Std Dev C-O Std Dev SPM1 XP -0.57 0.05 -0.16 0.05 SPM2 HP 1.29 0.11 -0.14 0.05

c) DGPS’ System’s verification (re-carried out) – 11 Feb 2008

Easting Northing

System C-O Std Dev C-O Std Dev DG_V_XP_EXP -0.48 0.03 0.26 0.04

SPM1_XP -0.31 0.02 -0.06 0.01 SPM1_HP 0.47 0.05 -0.30 0.05 SPM2_XP -0.50 0.05 0.28 0.05 SPM2_HP 1.26 0.09 -0.23 0.06



d) Tailbuoy System’s verification – 6 Feb 2008

Easting Northing TB SERIAL # C-O Std Dev C-O Std Dev

1314 -0.70 0.73 -2.70 0.65 1411 -2.72 2.10 -0.27 1.34 2320 -1.67 1.13 -0.67 0.93 0869 -1.04 1.20 -0.17 0.93 1511 -1.23 1.49 -1.04 1.53 1320 -2.61 1.12 1.22 1.08

PROJECT DETAILS Client : CGG Veritas – Asia Pacific

9 Serangoon North Ave. 5 CGGVeritas Hub Singapore 554531 Tel: +65 6723 5630 Fax: +65 6723 5552 Cell: +65 9186 3619

Contractor : Subsea 7 (Singapore) Pte Ltd

No 39 Tampines Street 92, #02-00 2E Capital Building Singapore 528883 Tel (Direct): +(65)-6785 4396 (Ext. 101) Tel (Mobile): +(65)-9146 1432 and +(60) 12 7238452 Fax: +(65)-6260 4465

Project :

Gyro Calibration DGPS System’s Verification Tail Buoy System’s Verification Vessel : MV Pacific Titan Location : Laying Jetty, Singapore Equipment : Nikon DTM-552 Total station Personnel : Rolando Paguio (Surveyor) Rostam Rosli Date : 6 & 11 February 2008



3. SURVEY PROCEDURES Survey origin at Loyang Jetty, Singapore Three geodetic control stations were established on 21 December 2006 by Subsea7 (Singapore) Pte Ltd for the purpose of carrying out survey works for the vessel berthed at Loyang Jetty, Singapore . The stations are:

Station Easting Northing EL Description S1 385 112.540 152 940.435 4.694 nail S2 385 104.607 152 963.277 4.714 nail S3 385 082.549 153 024.532 4.676 nail

These stations were identified on the ground and their relative bearings and distances were checked prior to usage. Current Survey For this calibration, temporary stations TS1 and TS2 were established. TS1 was used as instrument station for carrying out DGPS/Tail Buoy system’s verification while TS2 was used as instrument station for Gyro calibration on 6

th Feb 2008.

Coordinates of stations TS1 and TS2 are as follow:

Station Easting Northing TS1 385 108.610 152 951.442 TS2 385 105.024 152 959.150

Calibration Preliminaries Prior to the calibration, the following were carried out: - All mooring lines were tightened - There was no heavy loading on the vessel - The surveyor’s time piece was synchronized with the vessel computer time - All C-O were removed from the vessel’s computers (i.e. logged raw data only) - Advised the navigators to log onto the correct differential stations - Advised the navigators to monitor the vessel’s data when calibration is on-going



3.1 PRISM INSTALLATION

On 6th

February 2008, the vessel’s heading was 250º. At this direction, Gyro calibration, DGPS/Tail Buoy system’s verification were carried out. For gyro calibration, the bow and stern reflector was set up at the foremost part of the bow and stern of the vessel. Reflectors were also set up at SPM1 XP and SPM2 HP antennas for DGPS system’s verification.

3.2 CALIBRATION/VERIFICATION PROCEDURES

Gyro Calibration For Gyro calibration at 250º heading, total station was set up at temporary station TS2, and S3 was used as reference station. Grid bearings and horizontal distances were observed to the reflectors set up at the bow and stern of the vessel. Simultaneously, a 3-second interval readings were being logged from the vessel’s gyro while observations from total station were being carried out. DGPS System’s Verification The total station was set up at temporary station TS1, and S3 was used as reference station. Grid bearings and horizontal distances were observed to the prism set up at SPM1 XP and SPM2 HP antennas. 3-second interval readings were then logged from the vessel while observations from total station were being carried out. On 11

th of February 2008, DGPS systems verifications were re-carried out. Same procedure was

applied, but observations were done at different instrument station and reference bearing such as S2 and S3. Positions from XP EXP, SPM1 XP, SPM1 HP, SPM2 XP and SPM2 HP were simultaneously logged from the vessel while reflectors set up at DGPS antennas were being observed. Tailbuoy System’s Verification Tail Buoy system’s verification was carried out simultaneously with the DGPS verification. A known position was established using total station and from this position, 6 x rDGPS pods were set up and ranges and bearings relative to SPM1 XP antenna were logged at 3-second interval.



4. GEODETIC PARAMETERS The survey work was computed based on the following geodetic and projection system. Geodetic Reference System

Datum WGS 84 Spheroid WGS 84 Semi-major axis 6 378 137.0000 metres Semi-minor axis 6 356 752.3142 metres Inverse flattening 298.257 223 563 metres Eccentricity 0.006 694 380

Projection Parameters

Grid Universal Transverse Mercator (UTM) Projection type Transverse Mercator Central Meridian 105º E Latitude of origin 0º (Equator) False Easting 500 000 metres False Northing 0 metres Scale factor on CM 0.9996



5. RESULTS Gyro Calibration The grid bearings derived from the observation of bow and stern reflectors were converted to true bearings. These were then compared with the ship’s print out for AD 100 and HS 50 gyros to obtain the C-O corrections for 250º heading of the vessel. The convergence at Station TS2 and S3 was computed to be minus 0.03 deg. True Bearing = Grid Bearing Minus 0.03 º All observed distances were converted to grid distances. The scale factor used was 0.9998798. DGPS System’s Verification The observed grid bearings and distances from the reflectors set up at DGPS antennas were converted to easting and northing. These computed coordinates were then compared to the vessel’s XP EXP, SPM1 XP, SPM1 HP, SPM2 XP and SPM2 HP easting and northing print outs to derive the C-O corrections. Tailbuoy System’s Verification The observed ranges and bearings relative to SPM1 XP antenna were converted to easting and northing. The mean coordinates of each rDGPS pod were then compared to known established position to derive the C-O corrections for easting and northing.



Calibration undertaken in Balikpapan, Indonesia













Appendix 4 Medevac Plan



Appendix 5 Contact List

